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From "Keith Wall (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-8091) [Broker-J] [AMQP 1.0] Store transaction timeout feature
Date Thu, 01 Feb 2018 12:40:00 GMT
Keith Wall created QPID-8091:
--------------------------------

             Summary: [Broker-J] [AMQP 1.0] Store transaction timeout feature
                 Key: QPID-8091
                 URL: https://issues.apache.org/jira/browse/QPID-8091
             Project: Qpid
          Issue Type: Improvement
          Components: Broker-J
            Reporter: Keith Wall
             Fix For: qpid-java-broker-7.1.0


Berkeley JE's design means that once a transaction has begun, its internal cleaner is unable
to clean beyond the point the transaction started in the transaction log.  Other transaction
work continues as normal, but the disk space utilisation can't shrink until the long running
transaction is completed.  In an extreme case, disk space can be exhausted.

This has consequence for long running store transactions in Qpid.  For 0-x, the transaction
timeout features allows the the length of time a transaction may be open or idle to be constrained,
thus limiting the harmful effects of a long running store transaction.

For robustness, that features needs to be implemented on AMQP 1.0 too.   A decision needs
to be made about the correct course of action to be taken when a long running transaction
exceeds the threshold.   The transaction coordinator link could be closed with an error or
the entire connection closed.



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